Comparison of auditory brainstem response and behavioral audiometry in infants

Area of Science:

• Audiology
• Pediatric audiology
• Infant hearing assessment

Background:

• Accurate hearing assessment in infants is crucial for early detection of hearing loss.
• Different audiometric methods yield varying results in young children.
• Understanding age-related performance of these tests is essential for clinical practice.

Purpose of the Study:

• To compare the efficacy of Behavioral Observation Audiometry (BOA), Visual Reinforcement Audiometry (VRA), and Auditory Brainstem Response Audiometry (ABR) in normal-hearing infants.
• To analyze how age influences hearing threshold measurements obtained by BOA, VRA, and ABR.
• To determine the most reliable audiological assessment for infants across different age groups.

Main Methods:

• Sixty-three normal-hearing infants aged 1-12 months were tested.
• Audiological evaluations included Behavioral Observation Audiometry (BOA), Visual Reinforcement Audiometry (VRA), and Auditory Brainstem Response Audiometry (ABR).
• Hearing thresholds were recorded and analyzed in relation to infant age.

Main Results:

• BOA thresholds decreased with age in infants 0-6 months; ABR thresholds remained constant.
• VRA thresholds were obtainable from 4 months onwards and were consistent.
• Neonatal BOA thresholds were higher than ABR; thresholds converged around 6 months, with VRA lowest and BOA highest.
• ABR provided the most consistent thresholds across all ages.

Conclusions:

• ABR offers the most stable and reliable hearing threshold measurement in infants from birth to 12 months.
• BOA and VRA show age-dependent variability, with thresholds converging around 6 months.
• Clinical audiological assessments should consider the age of the infant and the specific test's performance characteristics.